a bullet hits a wooden block with the speed of 30m/s.What time does it takes to penetrate through 20cm in the block
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a bullet hits a wooden block with the speed of 30m/s.What time does it takes to penetrate through 20cm in the block
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Explanation:
Given,
u=300m/s
v=200m/s
s=20cm=0.20m
m=10g=0.01kg
3rd equation of motion,
2as=v2−u2
retardation, a=−125000m/s2
The resistance force, F=ma
F=0.01×125000
F=1250N
Answer:
A bullet of mass 10 g strikes a wooden block with a velocity of 300 ms
−1
. After penetrating 20 cm into it, its velocity drops to 200 ms
−1
. Then average resistance offered by the block is :
Medium